Photographic cartridge



J. G. JONES PHOTOGRAPHIC CARTRIDGE Filed May 10, 1923 A ORNEYS.

WITNESS Patented Jan. 13, 1925.

U HTED STATES nane FHQE.

ASSIGNOR TO EASTMAN KO'D'AK COM- CORPORATION OF NEW YORK.

FATENT PHOTOGRAPHIC CARTRIDGE.

Application filed May 10, 1923. Serial No. 638,076.

T 0 all whomit may concern:

Be it known that 1, JOHN G. JoNns, a citizen of the United Stat-es of America, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Photographic Cartridges, of which the following is a. full, clear, and exact specification.

This invention relates to photographic roll film cartridges of the type commonly used in cameras and comprising a roll of film and protective paper therefor.

More particularly this invention has for its object the elimination of the fault commonly known as edge fog, which results from the undesired leaking or light into the margin or border of a roll film. In my Patent No. 1,454,812 granted May 8, 1923, I have disclosed the use of a protective paper which, even though wider than the distance between the flanges, is adapted to buckle or be. compressed upon itself, thus forming light looks at the ends of the spool. In my other Patents Nos. 1,454,813 and 1,454,815 respectively, granted May 8, 1923, I have shown and claimed certain modified alternative methods ofattaining this end.

This application relates to modifications embodying certain of the features disclosed and claimed in the above patents. More particularly it relates to protective paper in which the greater flexibility is obtained by making longitudinal grooves in the paper, these grooves being of any desired cross section.

The advantages inherent in the forms disclosed in this application are similar to those described in the above mentioned patents.

It is obvious that modifications embodying the invention as defined in the appended claims are possible, and I have described certain of these, referring to the figures of the accompanying drawing. Those parts which are the same in the various figures bear the same reference characters in each.

Fig. 1 is a perspective view of a partially unwound film cartridge, the leader strip being broken away;

Fig. 2 is a. section of the protective paper;

Fig. 3 is a similar section showing the effect of lateral pressure;

Fig. 4 is a section of protective paper embodying a different form of invention;

Fig is a similar section showing the eifect or lateral pressure;

Fig. is a section of protective paper embodying still another form of my invention' Fig. 7 is a similar sect-ion showing the effect of lateral pressure;

Fig. is a. section of protective paper embodying yet another form of my invention;

Fig. 9 is a similar effect of lateral pressure;

Fig. 10 is a perspective view of a motion picture reel having wound thereon motion picture film with lead strips at the end embodying my invention, the whole being cut to show the section;

Fig. 11 is a section of the paper used thereon, with a fragment of paper shown in perspective.

It is to be understood that in all of figures the thickness of the protective paper is exaggerated in order to show more clean ly the nature of the. invention. It is further to be understood that the figures are not drawn to scale.

Upon a film spool of ordinary character comprising a core A and metallic end flanges C, are interwoimd a strip of film F and acking paper 1, to which the film is attached b-y usual sticker band S. The spool has the customary axial pintle opening (not shown) at one end and winding slot E at the other. As thus far described, the cartridge is in every way similar to thatin general use. The protective backing paper 1, however, is cut wider than the distance between the interior surfaces of the flange 0, and there are formed in it a series of longitudinal parallel grooves 2. As is com-- men, the backing paper 1 extends the full length of the film and beyond it at each end to form safety leader strips. In this form the longitudinal grooves extend the full length of this backing strip. hen the paper and film are thus interwound on the spool and the paper is thus subjected to lateral pressure, the thinner portions at the bottoms of the grooves 2, which are of? greater flexibility, will tend to buckle. This action will be understood by reference to Figs. 2 and 3. In the form here illustrated the grooves have flat bottoms, leaving thin portions of uniform thickness 3, and these tend to buckle, as indicated at 4:. It will section showing the the be noted that the band as a whole is lateral- 1y compressed without being piled up or made of greater thickness so that a coil of such material will not be distorted in an objectionable way.

As shown in these figures grooves are formed at regular intervals across the width of the paper, but I may form them with nonuniform spaces between them, as shown in Fig. i, where the backing paper 11 has two grooves 12. rather close together near each margin, and a wide central or medium space 15 between the two sets of grooves. These grooves have fiat bottoms leaving thin portions 13 of uniform thickness. hen submitted to lateral pressure they tend to crinkle, as indicated at la.

The groovesmay have any desired cross section, round bottomed grooves 22 being shown in the paper 21 in Fig. 6. The effects of compression are indicated in Fig. n

l at 44:.

If desired, grooves may be made on opposite surfaces of the paper, and when this is done I have found it advantageous to make them slightly out of registry, two rounded grooves 32 being shown so situated on the paper'31 in Fig. 8. They have a tendency to crinkle under lateral compression, as indicated at 34t in Fig. 9.

In. Fig. 10 is shown a coil of motion picture film 40 having at each end thereof a lead strip a], in the median line of each of which is a longitudinal rounded groove 42. This is better shown in an enlarged section in Fig. 11. These are shown wound on the usual type of reel a5 used in motion picturecameras and having acore l3 and flanges a l. In practice the number of convolutions would be greater than here shown and no attempt is made in this figure to show the crinkling of the paper due to compression. It is to be understood, however, that the width of the film is slightly less than the distance between the flanges 44;, while the width ofthe paper is slightly greater.

This embodiment of my invention has been found useful for reels designed to be used by amateurs where the highest degree of care is not to be eXpec'ted and where a convenient daylight loading reel or magazine is particularly desirable.

I have found that with paper having a width of about five-eighths of an inch and intended for use in a small portable motion picture camerathe groove or thinned portion may have a width of about an eighth of an inch and may have a depth of 'ahalf or two-thirds of the thicknessof the paper, the latter being .0035' or .004 inch thick and of good quality material. The dimensions of the grooves will, of course, depend very largely on the dimensions and quality of the material and will have to be de termined for the particular circumstances.

Even though the paper is not originally cut wider than the distance between the flanges, it is useful to have it compressible in the manner indicated, since it is liable to swell under changing atmospheric conditions, and also because if the paper tends to run slightly awry in the camera and creep toward one side the compressibility will perunit it still to be drawn through the camera without excessive binding.

Inmotion plcture film and,

along each margimas shown. at 46 in Fig.

7 lead strips it is customary to ha-vearowfof perforations 11. It is therefore undesirable to weaken the paper along these margins where it is subjected topulling strain and hence it is especially desirable to place the. groove in the median portion between perforations. p 7

When in the claims the term groove is used, it is intended to indicate a depression with two side walls, there being portions of normal thickness on eachside of the thinnest portion caused by such depression] It, is obvious that numerous embodiments of my invention are possible; and it is the rows of to be understood that the disclosure herein is illustrative, and that I contemplate as within the scope of my invention all such equivalents and modifications as fall within tliescope of theappended claims.

Having thus described my invention,

what claim as new and desire to secure by Letters Patent is: 7

1. An article for manufacture comprising a roll of sensitizedmaterial, a support therefor comprising spaced end fianges, and a strip-of protective material coiled around said sensitive material and having a longitudinal groove formed therein.

2. An article of manufacture comprising i a roll of sensitized material, 1 a support therefor comprislng spaced 'end flanges, and

said sensitive material and having a longitudinal groove formed therein, the width of the strip beinggrea'tenthan the distance between the flanges. v 3. A photographic film cartridge comprising a spool with spaced end flanges having flat inner facing surfaces, strip material, comprising photographically sensitive material and protective material, wound on said spool and including lead strips of protective material, said lead a strip of protective material coiled around i strips each having a longitudinal groove therein. 7

l. A photographic film cartridge comprising a spool With spaced end flanges having flat inner facing surfaces, strip material, comprising photographically sensitive material and protective material, Wound on said spool and including lead strips of protective material, said lead strips each having a longitudinal groove therein, and being Wider than the distance between the flanges.

5. An article of manufacture comprising a reel With a core and spaced flanges, a strip.

of sensitive material Wound thereon and having attached thereto at each end a lead strip, said lead strips each having a longitudinal groove therein.

6. An article of manufacture comprising a reel with a core and spaced flanges, a strip of sensitive material Wound thereon and having attached thereto at each end a lead strip, said lead strips each having a longitudinal groove therein, and the lead strips only being Wider than the distance between the flanges. V

7. An article of manufacture comprising a reel with a core and spaced flanges, strip material'comprising photographically sensitive material Wound 011 said spool and including lead strips of protective material, said lead strips each having a longitudinal groove in its median portions.

8. An article of manufacture comprising a reel With a core and spaced flanges, a strip of motion picture film Wound thereon and having attached thereto at each end a lead strip, said lead strips having a row of perforations in each margin and each lead strip having a longitudinal groove in the median portion between the rows of perforations.

9. An article of manufacture comprising a roll of sensitized material, a strip of pro tective material coiled around said sensitive material and having a longitudinal groove formed therein.

10. An article of manufacture compris ing a reel With a core and spaced flanges, a strip of sensitive material Wound thereon and having attached thereto at each end a lead strip, said lead strips each having a single central longitudinal groove therein.

11. An article of manufacture comprising a reel with a core and spaced flanges, a strip of motion picture film wound thereon and having attached thereto at each end a lead strip, said lead strips each having a row of perforations in each margin and a single, central longitudinal groove therein.

12. An article of manufacture comprising a roll of sensitized material, a strip of protective material coiled around said sensitive material and having a longitudinal groove therein, the depth of the groove being greatest at the center and decreasing toward the edges thereof.

13. An article of manufacture comprising a roll of sensitized material, a strip of protective material coiled around said sensitive material and having a longitudinal groove therein, the width of the groove being greater than a sixth of the Width of the strip.

Signed at Rochester, N. Y., this 3rd day of May 1923.

JOHN G. JONES. 

